TN Ready Science Review

Earth’s surface is mostly water. However, only a small amount of water on Earth is clean fresh water. Why is it important to maintain water quality?

• to keep water from evaporating

• to keep the ocean levels from lowering

• to keep the polar ice caps from melting

• to keep water from becoming a nonrenewable resource

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Many of the hybrid cars that people drive today run by burning gasoline, just as regular cars do. However, for some of the time that a hybrid car runs, it also charges an electric battery. This battery can be used to power the car so that the hybrid uses less gasoline than a regular car does. How could a hybrid car help reduce air pollution?

• It stores the harmful exhaust that it creates and uses that to power the car

• It burns less gasoline than a regular car does and thus produces less harmful exhaust.

• It uses alternative energy sources instead of gasoline, which produces harmful exhaust.

• It drives faster than a regular car does and therefore spends less time producing harmful exhaust.

Without other changes to a population, which of the following will cause a population to increase in size?

• The birth rate equals the death rate.

• The birth rate is less than the death rate.

• The birth rate is greater than the death rate.

• The birth rate and the death rate both equal 0.

Which of the following best describes the movement of heat energy in the global ocean?

• Heat energy is transported to the equator from the continents.

• Heat energy in deep currents is transported to the ocean’s surface.

• Heat energy in warm surface currents is transported to areas near Earth’s poles.

• Heat energy is transported from areas of lower temperature to areas of higher temperature.

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The following image shows a region used to grow crops. How does the image show a method of conservation?

• Arranging the steep land into levels slows erosion.

• Plowing land into layers causes plants to grow taller.

• Making the land steeper helps water flow more easily.

• Planting more seeds results in a greater number of plants.

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Scientists studied predator-prey relationships in a habitat. The diagram below shows the feeding relationships among organisms that a scientist might find in a certain environment. Which animal is both a predator and prey?

• owl

• plant

• snake

• cricket

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What is kinetic energy?

• energy of motion

• the sum of mechanical energy and potential energy

• stored energy due to position

• stored energy due to chemical composition

  
  

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A television weather forecaster said that warm, humid air near the ground was moving vertically into the cooler air above. What is likely to happen as a result?

• a tornado

• a hurricane

• a storm surge

• a thunderstorm

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Why do plants that grow in the tundra have shallow root systems?

• They have no soil in which to grow.

• They cannot grow through the permafrost.

• They are frequently soaked by heavy rains.

• They are trampled each time animals migrate.

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The turbine shown below is used to produce energy for human use. What type of energy conversion takes place in the turbine?

• wind energy to produce electrical energy

• solar energy to produce mechanical energy

• thermal energy to produce chemical energy

• energy from moving water to produce mechanical energy